import { AsyncValidator, AbstractControl, ValidationErrors } from '@angular/forms';
import { Observable } from 'rxjs';
import { _HttpClient } from '@delon/theme';
export declare class ValidateNameDirective implements AsyncValidator {
    http: _HttpClient;
    vparam: any;
    constructor(http: _HttpClient);
    validate(ctrl: AbstractControl): Promise<ValidationErrors | null> | Observable<ValidationErrors | null>;
}